You are looking at the HTML representation of the XML format.
HTML is good for debugging, but is unsuitable for application use.
Specify the format parameter to change the output format.
To see the non HTML representation of the XML format, set format=xml.
See the complete documentation, or API help for more information. 
<?xml version="1.0"?>
<api>
  <query-continue>
    <allfileusages gafcontinue="Camstudio-Telugu.pdf|44" />
  </query-continue>
  <query>
    <pages>
      <page pageid="3" ns="0" title="Spoken Tutorial Processes" />
      <page pageid="44" ns="0" title="Spoken Tutorial Technology/Creation of Spoken Tutorial using Camstudio" />
      <page pageid="98" ns="0" title="Software-Training" />
      <page pageid="170" ns="0" title="Spoken Tutorial Brochures/Archieved/Campus Ambassador Programme" />
      <page pageid="172" ns="0" title="Campus Ambassador Programme" />
    </pages>
  </query>
</api>